class_docstr: Write me
      
code: def test_policy(self, policy):
      self.__test_policy = policy
      self.__test_policy._set_agent(self)
  
imports: import collections
  import numpy
  from keras.callbacks import History
  from keras.models import Model
  from keras.layers import Input, Lambda
  import keras.backend
  from rl.core import Agent
  from rl.agents.dqn import mean_q
  from rl.util import huber_loss
  from rl.policy import EpsGreedyQPolicy, GreedyQPolicy
  from rl.util import get_object_config
label_desc: Use image node_id 17 for calling the SARSAAgent obj's underlying member method code with example usage: obj.test_policy(policy) without return types